KR20000047526A - A disk drive apparatus, disk drive control apparatus and system - Google Patents

Abstract

PURPOSE: A disk driver is provided to stop a recording/playing of a disk by detecting an external impact in the disc driver to record/play informational signals for two discs having different recording densities by moving two head units in a diameter direction. CONSTITUTION: A clear command detects an impact in a process of recording/playing a first disk(11) to clear impact flag. A command for detecting an impact is operated via a second interface unit when finish data per certain unit of recording/playing signals is received through a first interface unit from a disk drive device(10). Writing is performed through the first interface unit after the impact is detected by the command. A control signal is transmitted to the disk drive device through the second interface unit to stop recording/playing the first disk.

Description

DISK DRIVE APPARATUS, DISK DRIVE CONTROL APPARATUS AND SYSTEM}

The present invention relates to a disc drive device for recording / reproducing an information signal for a magnetic disc, a disc drive control device for controlling the disc drive device from the outside, and a disc drive control system comprising these disc drive devices and disc drive control devices. will be.

Conventionally, in a floppy disk drive device that records / reproduces an information signal with respect to a flexible floppy disk, a carriage connected to a head portion is moved by a stepping motor in the radial direction of the magnetic disk.

Basic operations such as movement of the head portion for recording / reproducing are all controlled from the host side via the interface I / F. Further, even if an abnormality occurs in the recording / reproducing, the drive device itself cannot detect it, and there is no means for reporting the abnormality to the host side. The shock from the outside mechanically maintains the position of the head.

By the way, in consideration of a disk drive apparatus of the type which is intended to be operated by moving the magnetic head portion in the radial direction of the floppy disk with a voice coil motor instead of a stepping motor through the carriage, if an impact is applied from the outside during recording, the recording is already performed. There was a possibility of destroying the data of adjacent tracks.

In addition, when the shock is eliminated, recording / playback must be retried, but the interface for retrying the drive device is not attached.

1 is a block diagram showing a configuration of a floppy-disk drive control system according to an embodiment of the present invention.

Fig. 2 is a diagram showing a standard recording density floppy disk and a high recording density floppy disk in which a floppy-disk drive device constituting the floppy-disk drive control system shown in Fig. 1 can be used.

3 is an external perspective view of a magnetic head device having a floppy-disk drive device constituting the floppy-disk drive control system shown in FIG.

4 is a flowchart for explaining the operation of the floppy-disk drive control system shown in FIG.

* Description of the symbols for the main parts of the drawings *

10: floppy disk drive 11: floppy disk

21: head unit 64,65: coil

70: head carriage 101: controller

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a disk drive apparatus of a type for recording / reproducing an information signal by moving two different head portions in a radial direction by a linear motor with respect to two disks having different recording densities. It is an object of the present invention to provide a disc drive device capable of detecting a shock from the outside and stopping the recording / reproducing process.

It is also an object of the present invention to provide a disk drive control apparatus and a system which can retry the disk drive apparatus when the impact is eliminated.

In order to solve the above problem, the disc drive device according to the present invention is a first head for recording / reproducing an information signal by moving a radial direction by a linear motor to a first disc on which an information signal is recorded at a first recording density. Means, a first interface means for receiving a signal to be recorded by the first head means from the outside, and for sending the signal reproduced by the first head means to the outside, and recording higher than the first recording density. A second head means for recording / reproducing the information signal by a linear motor with respect to the second disk on which the information signal is recorded at a density, and receiving a signal for recording by the second head means from the outside; At the same time, the second interface means for sending the signal reproduced by the second head means to the outside, and charging from outside Shock detection means for detecting a case, and control means for controlling the recording / reproducing process for the first and second disks when the shock detection means detects an impact.

Here, the control means is equipped with the first disk and at the same time recording / reproducing for the first disk based on a control signal received from the outside via the second interface means when the shock detection means detects an impact. Abort the process.

In addition, the disk drive control apparatus according to the present invention, in order to solve the above problems, to the first disk in which the information signal is recorded at the first recording density and to the second disk in which the information signal is recorded at higher recording density than the first recording density. A first head means and a second head means which are moved in the radial direction by a linear motor to record / reproduce the information signal, and send a signal for recording to the first head means and the second head means, A disk drive control device for controlling a disk drive device having a first interface means and a second interface means for receiving a signal reproduced by the head means and the second head means, wherein the disk drive device is adapted to the first disk. The clear command and the disc drive for detecting the shock and clearing the shock flag held during the recording / reproducing process. When receiving the end information for each predetermined unit of the recording / reproducing signal from the drive device via the first interface means, a command for detecting the presence or absence of an impact is issued via the second interface means, and Control means for executing a retry via said first interface means when a shock is detected by the detecting command.

In addition, in order to solve the above problems, the disc drive control system according to the present invention includes a first disc in which an information signal is recorded at a first recording density and a second disc in which an information signal is recorded at a recording density higher than the first recording density. A first head means and a second head means which are moved in the radial direction by a linear motor to record / reproduce the information signal, and send a signal for recording to the first head means and the second head means, A first interface means and a second interface means for receiving a signal reproduced by the head means and the second head means, and an impact detection means for detecting an impact from the outside, wherein when the impact from the outside is detected, the first interface means is provided. A disc drive device for stopping recording / reproducing processes for the first disc and the second disc, and the disc drive device comprises the first disc. A clear command for clearing the shock flag held by the shock detection means by the shock detection means during the recording / reproducing process for the data, and end information for each predetermined unit of the recording / reproducing signal from the disk drive apparatus via the first interface means. When receiving, a command for detecting the presence or absence of an impact is issued via the second interface means, and when the presence or absence of an impact is detected by a command for detecting the presence or absence of the impact, the disk drive device is sent to the disk drive apparatus via the first interface means. And a disc drive control device for retrying recording / playback.

Embodiment

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described, referring drawings. This embodiment is a floppy disk control system shown in FIG. This floppy disk control system consists of a floppy disk drive device 10 and a host computer 140.

As the floppy disk 11 that can be used in the floppy disk drive device 10, the floppy disks 11A and 11B shown in FIGS. 2A and 2B are assumed. That is, Fig. 2A shows a floppy disk 11A in which a high recording density (high mode) disk medium 12A having a large recording capacity of tens of Mbytes to several hundred Mbytes or more compatible with the existing floppy disks is accommodated. It is shown. Fig. 2B shows a floppy disk 11B in which a disk medium 12B of a conventional recording density (lower mode) has a conventional recording capacity of, for example, about 2M bytes.

2A and 2B, the record protector 15 indicates a recordable state when the hole is closed and a record inhibit state when the hole is open, and the HD hole 16 shows a recording capacity when the hole is open. This so-called 2HD disk of about 2M bytes (unformatted) represents a disk other than that when the hole is closed. In addition, in Fig. 2A, the hole 17 formed at a predetermined position other than the above-described write protector 15 or HD hole 16 is a large capacity floppy disk having a recording capacity of about tens of Mbytes to several hundred Mbytes. To indicate

In the floppy disk drive device 10, the drive of the magnetic head device 21 to the standard recording density floppy disk 11B and the high recording density floppy disk 11A is performed by a voice coil motor (hereinafter, VCM), which is a kind of linear motor. (108). Servo information is recorded in advance in the high recording density floppy disk 11A, and the VCM 108 is driven by reading the servo information to operate the magnetic head device 21.

By the way, when recording / reproducing the standard recording density floppy disk 11B, the floppy disk drive device 10 uses the magnetic head device 21 as a floppy at the VCM 108, not as a stepping motor via the head carriage 70. Since an attempt is made to move in the radial direction of the disk 11B, the recording / reproducing must be stopped if an excessive impact is applied to the floppy disk drive device 10 from the outside. This is because there is a possibility of destroying data of adjacent tracks that have already been recorded during recording. However, when the shock is eliminated, recording / playback must be retried from the host side.

Therefore, in the floppy disk drive device 10, the shock sense 116 detects an impact from the outside, stops recording / reproducing based on the detection result, and when the impact is eliminated, from the host side. Retry recording / playback by control. Detailed description will be described later.

Hereinafter, the configuration and operation of the floppy disk drive device 10 will be described in detail.

The magnetic head device 21 for magnetically recording and reproducing the floppy disk 11 includes head portions 22A and 22B which are arranged to face the floppy disk 11 so as to be sandwiched therein. The head portion 22A is for recording / reproducing the recording surface above the floppy disk 11, and the head portion 22B is for recording / reproducing for the recording surface below the floppy disk 11. In the head portions 22A and 22B, the head chip 23 for the standard recording density (lower mode) for the conventional floppy disk 11B and the high recording density (higher) for the high recording density floppy disk 11A are respectively provided. Attached to the head chip 24 for the " mode "

In the magnetic head device 21, the head portions 22A and 22B are supported by the support arms 40A and 40B. The support arms 40A and 40B are connected to the head carriage 70 which is moved in the radial direction of the floppy disk 11. The external appearance of the magnetic head device 21 is shown in FIG. A pair of coil support pieces 62 and 63 protrude from both sides of the proximal end side of the head carriage 70 and the voice coil motor VCM shown in FIG. 1 via these coil support pieces 62 and 63. Drive coils 64 and 65 inserted into the yoke of 108 are attached. The head carriage 70 is operated to move in the radial direction of the floppy disk 11 by supplying a drive current from the VCM 108 to the drive coils 64 and 65.

Referring again to FIG. 1, the floppy disk drive device 10 includes a controller 101 that controls the entire device. The controller 101 controls the rotation of the floppy disk 11, the movement control of the magnetic head device 21, the control of the recording / reproduction system for high recording density (high mode), and the standard recording density (low mode). Control of the recording / reproduction system is performed.

The controller 101 is connected to the bus 102. The controller 101 draws out a program stored in the flash memory 103 connected to the bus 102, and executes a control operation in accordance with the program.

In addition, the floppy disk drive device 10 determines whether the floppy disk 11 is the floppy disk 11A for the high recording density (high mode) or the floppy disk 11B for the standard recording density (low mode). It has the disk detection part 104 which detects using one hole 17 etc. The output signal of the disk detection unit 104 is supplied to the controller 101 as a mode signal SMD. The controller 101 controls switching of the rotational speed of the floppy disk 11 in accordance with the mode signal SMD. Switching control of the recording / reproduction system and switching control of the interface are performed.

The floppy disk drive device 10 also has a spindle motor 105 for rotating the floppy disk 11 and a spindle motor drive 106 for driving the motor 105. The frequency signal SFG corresponding to the rotational speed obtained from the spindle motor 105 is supplied to the controller 101 through the spindle motor driver 106. The controller 101 controls the spindle motor driver 106 so that the rotation speed of the floppy disk 11 becomes a predetermined value with reference to the frequency signal SFG.

In addition, the floppy disk drive device 10 moves the head carriage 70 to which the support arms 40A, 40B for supporting the head portions 22A, 22B constituting the magnetic head device 21 are connected in the radial direction of the disk. And a VCM driver 109 for driving the VCM 108. When the controller 101 is mounted with the high recording density floppy disk 11A, the controller 101 is based on the tracking information of the magnetic head device 21 output from the R / W channel IC 113 described later, gray code reading information, or the like. The VCM driver 109 is controlled so that the magnetic head device 21 is accurately positioned on the target track.

The floppy disk drive device 10 also has a recording / reproducing system for high recording density (high mode) and a recording / reproducing system for standard recording density (low mode). The recording / reproducing system for the high recording density (high mode) includes a disk controller 111 for exchanging data, status, and commands via the host computer side and the Advanced Technology Attachment Packet Interface (ATAPI) 118; DRAM 112 as a data buffer, the R / W channel IC 113 for performing the recording signal processing and the reproduction signal processing, and the recording signal output from the R / W channel IC 113 are amplified and the head portions 22A and 22B. A recording amplifier supplied to the head chip 24 for a high recording density (high mode), and a playback amplifier amplifying a reproduction signal reproduced from the head chip 24 and supplied to the R / W channel IC 113. It has an amplifier unit 114 to.

The disk controller 111 is connected to the bus 102. The operations of the disk controller 111 and the R / W channel IC 113 are controlled by the controller 101, respectively.

The floppy disk drive device 10 also has an FDD controller 115 as a recording and reproduction system for a standard recording density (lower mode), which has a host computer 140 and an FDD interface 117. Is connected via The FDD controller 115 generates and supplies a recording signal from the MFM modulated data transferred from the host computer 140 at the time of writing to the head chip 23, and at the same time reads from the reproduction signal from the head chip 23 at the time of reading. A function for obtaining MFM modulation data and supplying it to the host computer 140 is provided.

That is, the floppy disk drive device 10 is moved by the VCM 108 in the radial direction with respect to the floppy disk 11B for the standard recording density (lower mode) to record / reproduce the information signal. ) And an information signal for recording by the head chip 23 are received from an external host computer 140, and at the same time, the information signal reproduced by the head chip 23 is sent to an external host computer 140. Head chip 24 which is moved in the radial direction by the VCM 108 with respect to the FDD I / F section 117 and the floppy disk 11A for the high recording density (high mode). ) And an information signal for recording by the head chip 24 are received from an external host computer 140. At the same time, the ATAPI-I / F unit 118 for sending the information signal reproduced by the head chip 24 to the external host computer 140, the shock sense 116 for detecting the impact from the outside, and A controller that controls recording / playback processing for the floppy disk 11B for the standard recording density (lower mode) and the floppy disk 11A for the high recording density (higher mode) when an impact is detected by the shock sense 116. 101 is provided.

In addition, the floppy disk drive device 10 performs a write signal processing on the information signal for recording received from the host computer 140 via the FDD-I / F unit 117 and at the same time by the head chip 23. The FDD controller 115 performs reproduction signal processing on the reproduced information signal.

In particular, the controller 101 passes through the ATAPI-I / F 118 when the floppy disk 11B for the standard recording density (lower mode) is mounted on the disk table and the shock sense 116 detects an impact. The recording / reproducing signal processing of the FDD controller 115 is stopped based on the control signal received from the host computer 140.

In addition, the floppy disk drive device 10 includes a retaining portion for holding an impact flag when the impact sense 116 detects an impact, and a control signal for clearing the impact flag held by the retaining portion is ATAPLI-I /. When transferred from the host computer 140 via the F 118 and a recording / reproducing command is transferred at the same time, the recording / reproducing signal processing of the FDD controller 115 is started.

On the other hand, the host computer 140 includes a clear command for detecting a shock during the recording / reproducing process of the floppy disk 11B for the standard recording density (lower mode) by the floppy disk drive device 10 to clear the shock flag retained, And a command for detecting the presence or absence of a shock when receiving the end information for each predetermined unit of the recording / reproducing signal via the FDD-I / F unit 117 from the disk drive apparatus 10. The ATAPI-I / F (118) A central processing unit (141: CPU) that issues a retrieval via the FDD and I / F unit 117 when it is issued via a command to detect the presence or absence of the impact. ).

The host computer 140 also includes an I / F 142 having functions for two I / Fs 117 and 118 on the floppy disk drive device 10 side.

Next, the overall operation of the floppy disk drive device 10 will be described. When the floppy disk 11B for the standard recording density (lower mode) is mounted as the floppy disk 11, the mode signal SMD supplied from the disk detection unit 104 to the controller 101 indicates a lower mode. Therefore, based on the frequency signal SFG from the spindle motor 105, the spindle motor driver 106 is controlled by the controller 101, and the floppy disk 11B rotates at the standard speed (for example, 300 rpm). Will be done. In addition, under the control of the controller 101, the recording and reproducing system for the standard recording density (lower mode) is used.

In this state, at the time of recording, MFM modulation data is supplied as recording data from the host computer 140 to the FDD controller 115 via the FDD interface 117, and corresponds to the MFM modulation data from the FDD controller 115. The recording signal is output and supplied to the head chip 23 of the head portions 22A and 22B, and recorded in a predetermined sector of the target track of the floppy disk 11. On the other hand, at the time of reading, the signal reproduced by the head chip 23 from the predetermined sector of the target track of the floppy disk 11 is supplied to the FDD controller 115, and the MFM corresponding to the reproduction signal from the FDD controller 115 is supplied. The modulated data is output via the FDD interface 117 and supplied to the host computer 140.

When the floppy disk 11A for high recording density (high mode) is mounted as the floppy disk 11, the mode signal SMD supplied from the disk detection unit 104 to the controller 101 indicates the above mode. Therefore, based on the frequency signal SFG from the spindle motor 105, the spindle motor driver 106 is controlled by the controller 101, and the floppy disk 11A is rotated at a high speed (for example, 3600 rpm). . Further, under the control of the controller 101, a recording and reproducing system for high recording density (high mode) is used.

In this state, at the time of writing, the recording data is supplied from the host computer 140 to the disk controller 111 via the ATAPI-I / F 118, and the recording data is temporarily stored in the DRAM 112. FIG. . Then, the disk controller 111 adds an error correction code or interleaves the data for recording to generate the recording data WD.

When recording to a predetermined sector of the target track of the floppy disk 11, the write data WD is supplied from the disk controller 111 to the R / W channel IC 113, and the R / W channel IC 113 is supplied. ), The recording signal SR corresponding to the recording data WD is outputted and supplied to the head chip 24 of the head portions 22A and 22B through the recording amplifier of the amplifier section 114, thereby providing the target of the floppy disk 11. It is recorded in a predetermined sector of the track.

On the other hand, at the time of reading, the signal reproduced by the head chip 24 from the predetermined sector of the target track of the floppy disk 11 is amplified by the reproduction amplifier of the amplifier section 114 and supplied to the R / W channel IC 113. Thus, waveform equalization processing, data identification processing, 16/17 code decoding processing, and the like are performed by the R / W channel IC 113 to obtain read data RD. The read data RD is supplied to the disk controller 111 to perform deinterleaving or error correction processing to obtain final read data. After the read data is temporarily stored in the DRAM 112, the ATAPI-I / It is supplied to the host computer 140 via F 118.

When the disk drive device 10 detects excessive shock from the outside by the shock sensor 116 during recording / reproducing of the standard recording density floppy disk 11B, recording / reproducing is performed based on the detection result. Stop. In addition, after the excessive shock is eliminated, the host computer 140 executes the retry.

For this reason, in the floppy disk control system which consists of the floppy disk drive apparatus 10 and the host computer 140 which controls this floppy disk drive apparatus 10, the floppy disk 11B of a standard recording density is attached, When the information signal is to be recorded from the host computer 140 side, the processing is executed in the order shown in the flowchart of FIG. 4 below. Here, the impact at the time of data write for each sector is considered. In this flowchart, the processing on the host computer 140 side is set to H1 to H7, and the processing on the floppy disk drive device 10 side is set to D1 to D9.

First, the host computer 140 issues a clear command of the impact flag to the H1 via the ATAPI vendor unique command via the ATAPI-I / F 118. Then, the controller 101 of the floppy-disk drive device 10 clears the impact flag 1 with D1.

Next, when the host computer 140 issues a write command to H2 and the floppy disk drive device 10 receives the write command to D2, the controller 101 sends the write gate of the FDD controller 115 to D3. ON. Specifically, the FDD controller 115 generates a recording signal corresponding to the MFM modulation data as sector-based recording data transferred from the host computer 140 to the FDD controller 115 via the FDD interface 117. Then, the write signal is supplied to the head chip 23 of the head portions 22A and 22B.

The controller 101 of the floppy-disk drive device 10 determines the end of sector write data at D4, and transfers data to the write gate of the FDD controller 115 at D5 if it is not the end yet. On the other hand, if it is determined that the end in D4, the process proceeds to D9.

In addition, the controller 101 is executing a light while executing to see the current state of the shock sensor 116 at D6, and whether the shock sensor 116 has detected an excessive shock to the drive device 10. If it is determined that an impact is detected, the process proceeds to D7 and the light gate is 0FF. Then, the impact flag is set to 1 at D8. On the other hand, if the shock sensor 116 does not detect excessive shock in D6, it will return to step S4.

At D9 the controller 101 returns the value of the impact flag via the ATAPI-I / F 118. The processing in this D9 is executed after the impact flag check command is issued by the ATAPI vendor unique command from the host computer 140 via the ATAPI-I / F 118 in H3.

By looking at the impact flag from D9, the host computer 140 detects the presence or absence of the impact of the floppy-disk drive device 10 at H4. As a result, if it is determined in H5 that the impact flag is 1, that is, an impact is detected, then in H6, a clear command of the impact flag is issued and transferred to the controller 101 via the ATAPI-I / F 118. Note that issuance of a clear command in H6 may be omitted.

Then, the write retry program is started in H7 to cause the floppy-disk drive device 10 to execute the write again.

Therefore, as the floppy disk control system shown in Fig. 1, the floppy disk drive device 10 is equipped with a floppy disk 11B having a standard recording density, and write data is transferred from the host computer 140. When an excessive shock is detected, recording can be stopped once. In addition, when the impact is eliminated, the host computer 140 can cause the floppy-disk drive device 10 to rewrite the recording.

In addition, when the floppy disk 11A for high recording density (high mode) is attached to the floppy disk drive apparatus 10, the VCM 108 is driven based on the servo information previously recorded on the disk 11A. . For this reason, even if an excessive shock occurs, the head chip 24 can be quickly followed to a desired track for retrying, but a floppy disk 11A for high recording density (high mode) is mounted, and a host computer ( When the write data is supplied from the 140 side and the shock sensor 116 detects an excessive shock, the control may be forcibly interrupted and retried by the control on the host computer 140 side.

According to the present invention, even in a disc drive device of the type which records / reproduces an information signal by moving two different head portions in a radial direction by a linear motor with respect to two discs having different recording densities, an external impact is prevented. Detects and stops recording / playback. For this reason, data that has already been recorded on adjacent tracks is not destroyed.

In addition, the disk drive control apparatus and system according to the present invention can cause the disk drive apparatus to retry when the impact is eliminated.

Claims (13)

First head means for recording / reproducing the information signal by being moved in the radial direction by the linear motor with respect to the first disk on which the information signal is recorded at the first recording density; First interface means for receiving a signal to be recorded by the first head means from the outside and for conveying the signal reproduced by the first head means to the outside; Second head means for being operated in a radial direction by a linear motor to record / reproduce the information signal with respect to the second disk on which the information signal is recorded at a recording density higher than the first recording density; Second interface means for receiving a signal to be recorded by the second head means from the outside and transferring the signal reproduced by the second head means to the outside; Impact detection means for detecting an impact from the outside, And control means for controlling the recording / reproducing process for the first and second disks when an impact is detected by the impact detecting means. The method of claim 1, The control means is mounted with the first disk, and stops recording / reproducing processing for the first disk based on a control signal received from the outside through the second interface means when the shock detection means detects an impact. Disk drive device, characterized in that. The method of claim 1, First recording / reproducing signal processing means for performing recording signal processing to signals for recording received from the outside via the first interface means, and performing reproduction signal processing to signals reproduced by the first head means. Wherein the control means is equipped with the first disk, and the first recording / reproducing signal process is based on a control signal received from the outside through the second interface means when the shock detection means detects an impact. A disk drive device, characterized in that to stop the recording / playback signal processing of the means. The method of claim 3, wherein And a holding means for holding a flag when the impact detecting means detects an impact, and a control signal for clearing the flag held in the holding means is conveyed from the outside through the second interface means, and is also a recording / reproducing command. And the control means starts recording / reproducing signal processing by the first recording / reproducing signal processing means. The method of claim 1, And the first interface is a floppy disk drive interface (FDD I / F) and the second interface is an ATAPI I / F. The method of claim 1, And the first head means and the second head means are supported by a common head carriage. A linear motor is moved in the radial direction with respect to the first disc in which the information signal is recorded at the first recording density and the second disc in which the information signal is recorded at a recording density higher than the first recording density, thereby recording / reproducing the information signal. A first head means and a second head means, and a first head means and a second head means for transferring signals for recording and receiving signals reproduced by the first head means and the second head means. A disk drive control device for controlling a disk drive device having a first interface means and a second interface means, A clear command for clearing a shock flag held by the disk drive apparatus during the recording / reproducing process for the first disk by detecting the impact; and a predetermined unit of a recording / reproducing signal from the disk drive apparatus via the first interface means. A command for detecting the presence or absence of an impact is issued via the second interface means when receiving the end information for each time, and when the presence or absence of an impact is detected by a command for detecting the presence or absence of the impact. And a control means for executing the retry. The method of claim 7, wherein The disk drive apparatus performs recording signal processing on a signal for recording received from the outside through the first interface means, and at the same time performs a first recording / processing on a signal reproduced by the first head means. And a reproducing signal processing means, wherein the control means transfers a control signal to the disc drive apparatus through the second interface means when a first disc is mounted to the disc drive apparatus, and an impact is detected. A disk drive control apparatus characterized by stopping the recording / reproducing signal processing of the first recording / reproducing signal processing means. The first disc in which the information signal is recorded at the first recording density and the second disc in which the information signal is recorded at a recording density higher than the first recording density are moved and operated radially by the linear motor to record / reproduce the information signal. A first head means and a second head means, and a first head means and a second head means for transferring signals for recording and receiving signals reproduced by the first head means and the second head means. A disc having first interface means and second interface means and impact detection means for detecting an impact from outside, for controlling recording / reproducing processing for the first and second discs when an impact from the outside is detected; Drive device, A clear command for clearing a shock flag which the disk drive apparatus detects and holds a shock with the shock detecting means during the recording / reproducing process for the first disk, and recording / recording from the disk drive apparatus via the first interface means. When receiving the end information for each predetermined unit of the reproduction signal, a command for detecting the presence or absence of an impact is issued via the second interface means, and when the presence or absence of the impact is detected by a command for detecting the presence or absence of the impact. And a disc drive control device for retrying recording / reproducing to said disc drive device via a first interface means. The method of claim 9, The disk drive apparatus performs recording signal processing on a signal for recording received from the outside through the first interface means, and at the same time performs a first recording / processing on a signal reproduced by the first head means. And a reproducing signal processing means, wherein the disc control device is equipped with a first disc in the disc drive device, and transfers a control signal to the disc drive device through the second interface means when an impact is detected, And recording / reproducing signal processing of said first recording / reproducing signal processing means is interrupted. A linear motor is moved in the radial direction with respect to the first disk on which the information signal is recorded at the first recording density and the second disk on which the information signal is recorded at a recording density higher than the first recording density to record / reproduce the information signal. Interface for receiving a signal reproduced by the first head means and the second head means while transferring a signal for recording to the first head means and the second head means, and the first head means and the second head means. A disk drive apparatus having means and shock detection means for detecting an impact from the outside, for controlling recording / reproducing processing for the first and second disks; And a host computer for transmitting a signal for recording to the first head means and the second head means via the interface means and receiving a signal reproduced by the first head means and the second head means, When the disk drive apparatus detects a shock by the impact detecting means during the recording / reproducing process for the first or second disk, recording / recording on the first or second disk based on the information signal of the host computer. And a disc drive control means for controlling the operation of the reproduction. The method of claim 11, The interface means transfers a signal for recording to the first disk, a first interface for transporting a signal read from the first disk, and a signal for recording to the second disk. And a second interface for transferring a signal read from the second disk, The disk drive control apparatus includes a clear command for clearing a shock flag that the disk drive apparatus detects and holds a shock with the shock detection means during a recording / reproducing process for the first disk, and the first command from the disk drive apparatus. A command for detecting the presence or absence of an impact upon receiving the end information for each predetermined unit of the recording / reproducing signal via the interface is issued via the second interface, and the command for detecting the presence or absence of the impact is present. And retry recording / playback to the disk drive device via the first interface upon detecting the. The method of claim 12, The disc drive device performs a first recording / reproducing process on a signal reproduced by the first head means and at the same time a recording signal process on a signal for recording received from the outside through the first interface. And a signal processing means, wherein the disc control device is equipped with a first disc in the disc drive device, and transfers a control signal to the disc drive device via the second interface when an impact is detected. A disc drive control system characterized by stopping recording / reproducing signal processing by the recording / reproducing signal processing means.